Patent US3284925A successfully refreshed from Google Patents.
US3284925A
Expired / Lapsed
US
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Programmed self-instruction and quiz apparatus
Assignee: Globe Book Co Inc
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Filing: 1964-06-24
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Granted: 1966-11-15
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Expires: 1984-06-24
Abstract
No abstract record available.
Inventors
- 👤 Bernard E Leventhal
- 👤 Lawrence H Feigenbaum
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 12:36
CPC Classifications
G; G09; G09B; G09B3/00; G09B3/02; G09B3/04
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
70 words
PROGRAMMED SELF-INSTRUCTION APPARATUS COMPRISING, IN COMBINATION, AT LEAST ONE PAGE HAVING A PLURALITY OF INDIVIDUAL FRAME SECTIONS, EACH OF SAID FRAME SECTIONS HAVING IDENTIFYING FRAME INDICIA, A QUESTION, AN ANSWER REFERENCE NOTE TO ANOTHER FRAME SECTION ON SAID PAGE, AND AN ANSWER IN ANOTHER FRAME SECTION ON SAID PAGE APPLYING TO SAID QUESTION, AND SAID REFERENCE NOTE IN SAID FRAME SECTION ON SAID PAGE REFERRING TO SAID OTHER FRAME SECTION.
References Cited (Backward Citations)
US3123920A
Cited
US3103073A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-11-14 | 1970-05-16 | 1970-11-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-14 | 1974-05-16 | 1974-11-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-14 | 1978-05-16 | 1978-11-15 | $7700.00 | Window Closed / Lapsed |